?? maincanvas.java
字號(hào):
import java.io.IOException;
import java.util.Random;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.LayerManager;
//定義游戲畫布屏幕
public class MainCanvas extends GameCanvas
implements Runnable,CommandListener {
//聲明自己的坦克對(duì)象
private MyTank m_Tank;
//設(shè)置敵人坦克數(shù)量
private int m_nTotalETank = 20;
//設(shè)置已經(jīng)消滅敵人坦克數(shù)量
private int m_nDestroyETank = 0;
//聲明敵人坦克數(shù)組
private EnemyTank m_eTank[];
//設(shè)置場(chǎng)景對(duì)象
private Scene m_Scene;
//聲明代表子彈爆炸的精靈的數(shù)組
public static ExplosionSprite m_aExplosion[];
//設(shè)置游戲結(jié)束標(biāo)志
private boolean m_bGameEnd;
//聲明圖層管理器
public static LayerManager m_LayerManager;
public static int m_nScrWidth;
public static int m_nScrHeight;
private TankMidlet m_midlet;
private Command CommandExit;
private Random m_Random;
private MyUI m_UI;
//構(gòu)造函數(shù)
public MainCanvas(TankMidlet midlet) throws IOException {
super(true);
m_midlet = midlet;
setCommandListener(this);
m_UI = new MyUI( getWidth(), getHeight() );
Thread t = new Thread(this);
t.start();
}
public void Start() {
m_UI = null;
CommandExit = new Command("退出", Command.EXIT, 0);
addCommand(CommandExit);
m_Random = new Random();
m_eTank = new EnemyTank[2];
m_aExplosion = new ExplosionSprite[3];
try{
Image image = Image.createImage("/tank.png");
m_Tank = new MyTank( image, 13, 13 );
image = Image.createImage("/enemyTank.png");
for( int n = 0; n < m_eTank.length; n ++ ){
m_eTank[n] = new EnemyTank( image, 13, 13 );
}
image = Image.createImage("/Explosion.png");
for( int m = 0; m < m_aExplosion.length; m ++ ){
m_aExplosion[m] = new ExplosionSprite( image, 21, 17 );
m_aExplosion[m].setVisible(false);
}
}
catch(IOException ioe){}
catch(Exception e){}
m_Scene = new Scene();
m_LayerManager = new LayerManager();
for( int m = 0; m < m_aExplosion.length; m ++ ){
m_LayerManager.append(m_aExplosion[m]);
}
m_LayerManager.append(m_Scene.m_LyCanPass);
m_LayerManager.append( m_Tank );
m_LayerManager.append( m_Tank.m_Bullet );
for( int n = 0; n < m_eTank.length; n ++ ){
m_LayerManager.append(m_eTank[n]);
m_LayerManager.append(m_eTank[n].m_Bullet);
}
m_LayerManager.append(m_Scene.m_LyBulletPass);
m_LayerManager.append(m_Scene.m_LyCanHit);
m_LayerManager.append(m_Scene.m_LyNotPass);
m_LayerManager.append(m_Scene.m_LyHQ);
m_Scene.LoadMap();
m_Tank.Start( 15 * 3 + 7, 15 * 10 + 7, 0, 2 );
SetViewWindow();
}
//游戲主循環(huán)
public void run() {
while (true) {
long times_s= System.currentTimeMillis();
Input();
Logic();
Render();
long times_e=System.currentTimeMillis();
long times=times_e-times_s;
if( times >80 ){
times =80;
}
try{
Thread.sleep(80- times );
}catch(InterruptedException ie){
ie.printStackTrace();
}
}
}
//獲取鍵盤輸入
private void Input() {
int keyStates = getKeyStates();
if( m_UI != null ){
if( m_UI.Input( keyStates ) == true ){
Start();
}
return;
}
m_Tank.Input( keyStates );
SetViewWindow();
}
//程序邏輯調(diào)用方法
private void Logic() {
if( m_UI != null ){
return;
}
for( int m = 0; m < m_aExplosion.length; m ++ ){
m_aExplosion[m].Logic();
}
m_Tank.Logic();
for( int n = 0; n < m_eTank.length; n ++ ){
m_eTank[n].Logic();
}
CheckCollision();
CreateETank();
}
private void Render() {
Graphics g = getGraphics();
//填充屏幕
g.setColor(0x000000);
g.fillRect(0, 0, getWidth(), getHeight());
if( m_UI != null ){
m_UI.Paint( g );
return;
}
//繪制圖層管理器
m_LayerManager.paint(g, 0, 0);
//游戲結(jié)束，顯示的屏幕
if (m_bGameEnd)
{
int w = getWidth();
int h = getHeight();
//g.setColor(0x000000);
//g.fillRect(0, 0, w, h);
g.setColor(0xffffff);
g.drawString("GAME OVER",w/2-80,h/2,Graphics.LEFT|Graphics.TOP);
g.drawString("Tank 1.0 B",w/2-80,h/2+15,Graphics.LEFT|Graphics.TOP);
g.drawString("java手機(jī)游戲開發(fā)培訓(xùn)教程",w/2-80,h/2+30,Graphics.LEFT|Graphics.TOP);
}
//繪制到屏幕
flushGraphics();
}
//按鍵處理程序
public void commandAction(Command c, Displayable s) {
if (c.getCommandType() == Command.EXIT) {
m_midlet.notifyDestroyed();
}
}
//設(shè)置可視窗口
public void SetViewWindow(){
if( m_LayerManager == null )
return;
int nX = m_Tank.getRefPixelX() - getWidth()/2;
int nY = m_Tank.getRefPixelY() - getHeight()/2;
if( nX < 0 )
nX = 0;
else if( nX > 15 * 13 - getWidth() )
nX = 15 * 13 - getWidth();
if( nY < 0 )
nY = 0;
else if( nY > 15 * 12 - getHeight() )
nY = 15 * 12 - getHeight();
m_LayerManager.setViewWindow( nX, nY, getWidth(), getHeight() );
}
//判斷碰撞檢測(cè)
private void CheckCollision(){
BulletSprite mB = m_Tank.m_Bullet;
BulletSprite mEB = null;
for( int n = 0; n < m_eTank.length; n ++ ){
mEB = m_eTank[n].m_Bullet;
//敵人子彈和我方坦克碰撞
if( mEB.collidesWith( m_Tank, false ) ){
mEB.setVisible(false);
m_bGameEnd = true;
break;
}
//我方子彈和敵人坦克碰撞
if( mB.collidesWith( m_eTank[n], false ) ){
CreateExplosion(mB.getRefPixelX(), mB.getRefPixelY());
mB.setVisible( false );
m_eTank[n].setVisible( false );
m_nDestroyETank ++;
if( m_nDestroyETank >= 20 ){
m_bGameEnd = true;
return;
}
}
//我方坦克和敵人碰撞
if( m_Tank.collidesWith( m_eTank[n], false ) ){
m_Tank.MoveBack();
m_eTank[n].MoveBack();
}
//敵人和地圖
if( m_eTank[n].collidesWith( m_Scene.m_LyBulletPass, false ) ){
m_eTank[n].MoveBack();
}
else if( m_eTank[n].collidesWith( m_Scene.m_LyCanHit, false ) ){
m_eTank[n].MoveBack();
}
else if( m_eTank[n].collidesWith( m_Scene.m_LyNotPass, false ) ){
m_eTank[n].MoveBack();
}
//敵人子彈與地圖相撞
int nERow = mEB.GetCurRow();
int nECol = mEB.GetCurCol();
if( nERow < 0 || nERow >= m_Scene.m_LyCanHit.getRows() ||
nECol < 0 || nECol >= m_Scene.m_LyCanHit.getColumns() ){
mEB.setVisible(false);
continue;
}
if( mEB.collidesWith( m_Scene.m_LyHQ, false ) ){
m_Scene.m_LyHQ.setCell( nECol, nERow, 6 );
CreateExplosion(mEB.getRefPixelX(), mEB.getRefPixelY());
mEB.setVisible( false );
m_bGameEnd = true;
return;
}
if( mEB.collidesWith( m_Scene.m_LyCanHit, false ) )
{
m_Scene.m_LyCanHit.setCell( nECol, nERow, 0 );
CreateExplosion(mEB.getRefPixelX(), mEB.getRefPixelY());
mEB.setVisible( false );
}
else if( mEB.collidesWith( m_Scene.m_LyNotPass, false ) ){
CreateExplosion(mEB.getRefPixelX(), mEB.getRefPixelY());
mEB.setVisible( false );
}
}
// 我方坦克和地圖
if( m_Tank.collidesWith( m_Scene.m_LyBulletPass, false ) ){
m_Tank.MoveBack();
}
else if( m_Tank.collidesWith( m_Scene.m_LyCanHit, false ) ){
m_Tank.MoveBack();
}
else if( m_Tank.collidesWith( m_Scene.m_LyNotPass, false ) ){
m_Tank.MoveBack();
}
//我方子彈與地圖相撞
int nRow = mB.GetCurRow();
int nCol = mB.GetCurCol();
if( nRow < 0 || nRow >= m_Scene.m_LyCanHit.getRows() ||
nCol < 0 || nCol >= m_Scene.m_LyCanHit.getColumns() ){
mB.setVisible(false);
return;
}
if( mB.collidesWith( m_Scene.m_LyHQ, false ) ){
m_Scene.m_LyHQ.setCell( nCol, nRow, 6 );
CreateExplosion(mB.getRefPixelX(), mB.getRefPixelY());
m_bGameEnd = true;
mB.setVisible( false );
}
else if( mB.collidesWith( m_Scene.m_LyCanHit, false ) )
{
m_Scene.m_LyCanHit.setCell( nCol, nRow, 0 );
CreateExplosion(mB.getRefPixelX(), mB.getRefPixelY());
mB.setVisible( false );
}
else if( mB.collidesWith( m_Scene.m_LyNotPass, false ) )
{
CreateExplosion(mB.getRefPixelX(), mB.getRefPixelY());
mB.setVisible( false );
}
}
//創(chuàng)建敵人坦克的方法
public void CreateETank() {
if( m_nTotalETank <= 0 )
return;
int nRs = m_Random.nextInt() % 20;
if( Math.abs(nRs) != 0 )
return;
for( int n = 0; n < m_eTank.length; n ++ ){
if( m_eTank[n].isVisible() )
continue;
m_eTank[n].Start( n * 2 * 15 + 15 + 7, 15 + 7, 2, 1 );
break;
}
}
//創(chuàng)建子彈爆炸對(duì)象
public void CreateExplosion( int nX, int nY ){
for( int m = 0; m < m_aExplosion.length; m ++ ){
if( m_aExplosion[m].isVisible() )
continue;
m_aExplosion[m].Start( nX, nY );
break;
}
}
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